Prince WilliamAge: 29Occupation: Being royal and stuffKnown For: As the eldest son of Prince Charles and the late Princess Diana, he’s second in the line to the British throne and recently married Kate Middleton in a wedding no one admits to watching but everyone totally did.

Kris AllenAge: 26Occupation: Singer and SongwriterKnown For: Being adorable and non-threatening, which led to besting flamboyant Adam Lambert to win ‘American Idol’ season 8

Katy Perry is just one of many stars to appear in the music video for her new single, 'Last Friday Night (T.G.I.F.)'.

In the video, which plays out like some type of homage to the 1989 movie 'She's Out of Control,' fans are treated to appearances by everyone from 'Glee's' Kevin McHale and Darren Criss, to 'Friday' singer Rebecca Black to - yep - Kenny G.

In one of the most "duh" moments of all time, infamous Internet sensation Rebecca Black has filmed a cameo appearance in the video for Katy Perry's new single, 'Last Friday Night (T.G.I.F.).'
The 13-year-old 'Friday' singer can be seen in the background in the teaser for Perry's music video, looking like she's having fun, fun, fun and thinking about the weekend.
The video also featured our first look at Perry's alter-ego, Kathy Beth Terry, whom you can friend on Facebook.

Rebecca Black is apparently turning what some are calling the "worst song ever" into huge profits.

Forbes writer Chris Barth recently took a look at the digital sales and video streams for her now infamous (but admittedly catchy) song 'Friday.' Thus far, the video has over 30 million streams on YouTube, which has apparently translated into an estimated $20,000 -- a big profit, considering Black's mother paid Ark Music Factory a little over $2,000 for two songs and the 'Friday' video.

By now, I'm sure you've heard about the latest internet sensation, Rebecca Black's video for the song, "Friday." Seems the company that produced it, Ark Music Factory, is in business to manufacture stars. Nothing new about that, really. That's what agents, producers & publicists do. But this time, somehow, it all seems a little creepy to me.

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